Installation Manual
Compartment installation is permitted - such compartments must be constructed in
accordance with BS 6798.
The wall on which the boiler is mounted must be of suitable load bearing capacity and
must be non-combustible.
The Keston Qudos 28s can be located virtually anywhere desired provided that all
regulations are complied with. Because of the boiler's compact size and venting flexibility,
the installation is not limited to a boiler room setting. Before locating the boiler near a living
space consider whether the sounds generated by the boiler will be objectionable. The
boiler may be located within a cupboard enclosure to reduce noise levels if located within
a living space. LPG boilers must not be installed in a cellar.
3.4 ELECTRICAL
3.4.1 Electrical Connections
The boiler must be connected to a permanent 230V ~ 50Hz supply, fused at 3A.
The boiler can be wired to a single switched live 230VAC signal input.
However, the boiler has TWO thermostats, and will therefore accept up to
TWO switched live 230VAC signal inputs, such as heating and hot water or
radiators and underfloor heating zones. Alternatively, a Keston Room
Controller can be connected directly, via two core low voltage cable, to the
terminals marked “OT”. The Keston Room Controller will then provide fully
room compensated control to ensure the boiler output is matched to the
rooms requirements at optimum boiler efficiency. This is only
recommended for heating only applications. The boiler can also be driven
by an external 0-10VDC input.
Wiring external to the boiler must be in accordance with current I.E.E wiring
regulations and local regulations.
The method of connection to the mains electricity supply must facilitate complete
electrical isolation of the boiler, preferably by the use of a fused, unswitched three
pin plug and a shuttered socket-outlet, both complying with the requirements of
WD420/3/2007 Chapter 3 : Boiler Location The Keston Qudos 28s & Qudos 28sP Boilers
Installation & Servicing Instructions Page : 12
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